I'm not sure I completely understand the question.
It's been estimated that 16% of lung cancers are related to radon exposure, but....
On June 18th, 2015. See this statement in context.
Section Head, Radon Education and Awareness, Radiation Protection Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Department of Health
I'm not sure I completely understand the question.
It's been estimated that 16% of lung cancers are related to radon exposure, but....
See context to find out what was said next.